There are about 51 galaxies in the Local Group, on the order of 100,000 in our Local Supercluster, and an estimated 100 billion in all of the observable universe.
Galaxies are vast collections of stars that populate our universe. But how many galaxies are there? Counting them seems like an impossible task. Sheer numbers is one problem — once the count gets into the billions, it takes a while to do the addition. Another problem is the limitation of our instruments. To get the best view, a telescope needs to have a large aperture (the diameter of the main mirror or lens) and be located above the atmosphere to avoid distortion from Earth's air.
Perhaps the most resonant example of this fact is the Hubble eXtreme Deep Field (XDF), an image made by combining 10 years of photographs from the Hubble Space Telescope. The telescope watched a small patch of sky in repeat visits for a total of 50 days, according to NASA. If you held your thumb at arm's length to cover the moon, the XDF area would be about the size of the head of a pin. By collecting faint light over many hours of observation, the XDF revealed thousands of galaxies, both nearby and very distant, making it the deepest image of the universe ever taken at that time. So if that single small spot contains thousands, imagine how many more galaxies could be found in other spots.
Our elite business partner delivers unsurpassed service, parts and value for isolation technologies and solutions used in harsh in-service conditions.
Licensed to manufacture specially designed parts for specific requirements, our company caters the needs of customers from all around the world as a reliable solutions partner in design and production processes.
BEAMIT Group specializes in 3D printing aeronautical components.
The official CAT Tourniquet. The Fastest, Safest, Most Effective Prehospital Field Tourniquet.
Composites not only play an important role in electrical engineering.
The CDMA Transceiver gives software solution for establishing telemetry and video link between two distant points.
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Heating of transit sheds, workshops and warehouses.
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Precision machining has been D&E’s focus since our founding.
A good offense is useless without a great defense. Our great defense is made up of the bravest men and women in the world, and they are only as effective as the tools they are provided.
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Online Yellow Pages for Aeronautics, Space, Defense, and Industry 4.0
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